//
//  MainTabBar.swift
//  weibo
//
//  Created by 谭仁川 on 15/11/27.
//  Copyright © 2015年 itcast. All rights reserved.
//

import UIKit

class MainTabBar: UITabBar {

    override init(frame: CGRect) {
        super.init(frame: frame)
        setupUI()
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        setupUI()
    }
    
    private func setupUI() {
    
        addSubview(composeBtn)
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        
        let w = screenW / 5
        let h = bounds.height
        let rect = CGRect(x: 0, y: 0, width: w, height: h)
        
        var index:CGFloat = 0
        for subview in subviews {
            if subview.isKindOfClass(NSClassFromString("UITabBarButton")!){
            
                subview.frame = CGRectOffset(rect, w * index, 0)
                
                
                index += (index == 1) ? 2 : 1

            
            }
        }
        
        composeBtn.frame = CGRectOffset(rect, 2 * w, 0)
        
        bringSubviewToFront(composeBtn)
    
    }
    lazy var composeBtn: UIButton = UIButton(imageName: "tabbar_compose_icon_add", backImage: "tabbar_compose_button")
}
